Perforating attachment for printing presses



Nov. 10, 1931. E. J. TILLSTROM PERFORATING ATTACHMENT FOR PRINTING PRESSES Filed Dec. 4, 1928 2 Sheets-Sheet l l I l l I Mal org JZH/sbm NOV. 10, 1931. E J TILLSTVROM 1,831,270

PERFORATING ATTACHMENT FOR PRINTING PRESSES Filed Dec. 4, 1928 2 Sheets-Sheet 2 Inventor lag d1): Zflalram @z; 463mg AZZornej Patented Nov. 10, 1931 UNITED; STATES ParanaorFIcE I EDGAR J. TILLSTB OM", OI? BENTON HARBOR, MICHIGAN, ASSIGNOR .TO REIIINGTON RAND. ING, 7 OF, BUFFALO, -YORK f PERFORMING TTACHMENT ron PRINTING rnnssns Application filed December 4, 1928. Serial No. 323,744.

This invention relates to perforating at-i tochments for rotary presses and it has particular reference to an attachment by means of which. paper or other fibrous material passing throughthe press may be perforated for facilitating the subsequent separation ofthe paper into anumher of portions.

In the preparation of printed paper forms for commercial and business use, it has heretofore been customary. towprint upon the paper such formal matter as maybe desired and subsequently to formzzlines ofwperforations primarily an of time, loss of paper, and It has been also proposed to perforate the paper on the press by insertored or inked series 5, diate object v sibility ing cutting members in the type platen. This proposal, however, is objectionable for the reason that the printing ink soils the perforating element, and so produces a colof perforations on the finished stock. Colored perforations are sometimes regarded as indicative of cheap or low-grade material, and hence, are objectionab] e in the production of a high class product.

The present invention has for its immethe provision of to be associated with a rotary press for perforating the paper in an easy and efficient manner. The perforating means are advantageously so disposed as to avoid any posof inking the perforations in the event that the device is used with a printing press, and is also so disposed as to permit of ready manipulation or adjustment.

A typical embodiment of a device embodying the present invention is shown in the accompanying drawings in which:

Fig. 1 is a fragmentary endelevational view of a printing press with a perforating attachment mounted thereon, parts being shown in cross section;

Fig. 2 is a fragmentary side elevational view of the structure shown in Fig. 1; and,

Fig. 3 is a fragmentary side elevational view of the same structure, including means for effecting the disengagement of the perthe bolts 15". on the paperbetween the printed portions- The methods of perforating such, I printed paper have been open to a number,

means adapted forat-ing roller;

discs from the stock onthe press A The press includesa frame within which is mounted a rotary cylinder or stock roller 11 adapted. to receive paper or other stock l2which passes around the roller during the process: of formation or printing. In front of-th'e ro-ller'll and extending longitudinally therewith is a shaft-1E3 mounted in the bearingsi' 14; Said'bearings-are remov'ably secured to thcgibs 15 of the brackets 15 by The brackets 15 are in turn secured to the frame 10 by the bolts 10'. As best shown in Figs. 2 and 3,-eachbearing 14' comprises. a block 16- provided. with. guides 17 forv the reception of a bearing bushing18 transversely movable toward or away from.

the roller 11. The bearing bushing extends: through. the said block andis provided with an; enlarged portion havingashoulder 18 abutting said block. -Each block 16 is recessed toireceive a. coil spring 19 which urgesthe' bushing l8 normally toward the roller 11. The block 16 and the bushihglB are respectively provided with. apertures 21 and 22which are-adapted tobe aligned when the bushing-183s; pushed awayfrom the roller l1, thereby. compressing the spring 19. When soalignedg-the bushing l8-may besecured awayfrom the roller 11 by inserting a locking pin-'23- as shown in Fig. 3.

Upon the shaft 13.are one or more per-. foratingrollers-Q each of which consists of an annular hub 25 provided with a radially extending threaded aperture for the reception of a set screw 26 by meansof which the hub may be secured? on the shaft 13 in an desiredlongitudinal position; Each hub 25 is formedwithanoff-set annular shoulder 27 upon which may. be disposeda toothed per foratingdisc 28, and which is secured on the hub 25 by means 'of an annular plate 29* guide and align the members 24: by means of their two-point contact at opposite ends of the shaft 13. In order to control the depth of perforation in accordance with the size or character of the stock on the roller 11, the contact rollers 32 are advantageously of almost the same outside diameter as the outside diameter of the perforating discs 28. By determining the relation of these diameters, it is possible to select contact rollers or perforating discs, which when associated with each other, will permit of a predetermined penetration of the stock.

with the partsassembled, as shown in Figs. 1 and 2, the stock receiving press roller 11 is driven from a suitable source of power, and the paper 12. passing around the roller is printed by means of type disposed on a platen located below the roller 11. The perforating elements 24 are positioned along the shaft 13 to produce perforations between lines of printing, and this locationof the printing edge is fixed bytightening the set screws 26, and also by manipulation of retaining collars 34 and washers 35 disposed adjacent the bearing bushings 18 which act to retain the shoulder 18 thereof in contact with the bearings 14, thereby retaining the shaft and the parts assembled thereon in fixed relation with the roller 10.: When the parts are so positioned, lines of perforations are produced in the stock 12 at predetermined points. Any variation in the thickness of the stock is corrected for by the cooperation of the contact rollers .32 which bear a predetermined relation to the diameter of the discs 28, and also by cooperation with the resiliently pressed bearing bushings 18. Upon the event of variations affecting the position of rollers 32 toward or away from the roller 11, the adjacent-discs 28 are constrained to-move a like amount, and the adjacent bearing 14 is likewise forced away from therollers in accordance with the displacement of the contact roller 32. The uniform depth of perforations alongpredetermined lines is therefore efiiciently efiected.

It will be understood that the invention is subject to structural modifications in the illustrated embodiment thereof and that the attachment may be applied to a variety of presses and is not necessarily restricted in its utility to the perforation of printed paper. When it is desired to remove the attachment from the press for access to the roller or to the underlying platen, the bushings 18 are pinned to the bearings 1e as previously described, and the screws 15 are removed therefrom, whereby the entire bearing and shaft assembly may be removed from the; brackets in a locked position. Thisassem bly may be subsequently remounted on the brackets 15 bya reversal of this process, without the necessity of adjustment of alignin front of and at either end of said press roller and removably secured to said brackets, each bearing having an aperture, a bush- It will be understood that in operationing slidably mounted in each of said bearings and each having an aperture, resilient means on the bearings for urging said bushings toward said press roller, a shaft journalled in said bushings, a perforating disc mounted on the shaft, contact rollers positioned on the shaft and maintained in con tact with said press roller by said resilient means, said lmshings being movable against said resilient means to remove said contact rollers fromsaid press rollers andalso to align the aperture in each bushing with the aperture in its corresponding bearing, and removable pin 'members inserted in the aligned apertures in each bushing and corresponding bearing to lock the bushings in their moved position.

- EDGAR J. TILLSTROM. 

